Dye composition



Patented May 31, 1927.

UNITED STATES JOSEPH. MERBITT MATTHEWS, OF NEW YORK,

OF NEW YORK, N. N. Y., A CORPORATION OF NEW YORK.

DYE COMPOSITION.

Ne Drawing.

This invention relates to dye compositions and particularly to a selt contained water soluble dry powder composition for house hold use in dyeing silk goods.

While there are a number of such (OIHPO' sitions on the market for cotton, I. am not aware of any especially for dyeing silk goods having the necessary requirements of fast dyeing by simple immersion and non-hygroscopicity and stability when packaged for retail trade. Such an article should also be readily and completely soluble; and should not leave specks which tend to spot the goods.

According to this invention, a stable, water soluble dye composition powder accomplishing the bove objects and having the above advantages is obtained by combining with an acid dye incapable of being precipitated by free acid or a leveling agent, a solid soluble organic material supplying free acid in the dye solution, and a leveling agent. A suitable solid soluble acid supplying material is maleic and a suitable leveler is sodium sulfate, neither of which precipitate dyes suitable for dyeing silk goods according to this invention. This invention is applicable to the dyeing of pure silk goods, or to goods in part of other fibres, a particular advantage of the invention being that the dyes used have no affinity in acid solution tor vegetable fibre and consequently will not stain cotton,

lace, etc. on silk garments. A. suitable composition, as for pink, is:

Grams. Scarlet .2 R 3 Fast crimson G R 3 Pure maleic acidn Sodium sulfate 300 These materials are mixed dry and ground into a uniform and very fine powder. The powder is then desiccated to remove moisture, and then packed and sealed in moisture-proof: paper envelopes for the market.

Application filed April 18, 1925.

Serial No. 24,265.

These packages keep indefinitely in good condition without decomposition or caking. The function of the maleic acid is to release tree acid in the solution and it also acts as a mordant on silk and helps to a taster color. It also makes the silk fibre more lustrous and gives it a body and a scroop that is desirable, especially in garments which are redyed after use. The so dium sulfate causes the up more evenly and assists in mordanting the silk fibre. The proportion of maleic acid may vary between limits, the amount employed depending on the particular dyes used and the depth 0t shade required. heavy shades, up to 7 5 gr. of dye stuflt' may be used to 150 gr. of maleic acid. Maleic acid works very well because of its stability in the dry mixture, and desirable acidity in solution.

This composition is completely soluble in warm or hot water Without residue and does not leave specks on the goods. The hotter the water the better, as the color is more test and penetrates better. The goods are first cleaned in neutral soap, then washed several times in warm water to remove the soap.

The dyeing process takes from 10 to 25 minutes, depending on the depth of shade and color. The goods are finished after rinsing well in warm water and drying.

1 claim:

A stable dry powder water soluble silk dye composition comprising an acid dye inca pable of being precipitated in the presence of maleic acid and sodium sulfate, maleic acid, and sodium sulfate, said composition being readily and completely soluble in warm water and being non-hygroscopic an non-caking when packed.

Signed at New York city, in thecounty of New York and State of New York this 16th day of April, A.

JOSEPH MERRITT MATTHEWS.

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color to be taken F For ASSIGNOR TO GLOBIENT, INC, 

